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D( x )
x = 0
3*x^-1-x^-2 = 0
x = 0
x = 0
3*x^-1-x^-2 = 0
3*x^-1-x^-2 = 0
t_1 = x^-1
3*t_1^1-1*t_1^2 = 0
3*t_1-t_1^2 = 0
DELTA = 3^2-(-1*0*4)
DELTA = 9
DELTA > 0
t_1 = (9^(1/2)-3)/(-1*2) or t_1 = (-9^(1/2)-3)/(-1*2)
t_1 = 0 or t_1 = 3
t_1 = 0
x^-1+0 = 0
x^-1 = 0
1*x^-1 = 0 // : 1
x^-1 = 0
x należy do O
t_1 = 3
x^-1-3 = 0
1*x^-1 = 3 // : 1
x^-1 = 3
-1 < 0
1/(x^1) = 3 // * x^1
1 = 3*x^1 // : 3
1/3 = x^1
x = 1/3
x in (-oo:0) U (0:1/3) U (1/3:+oo)
(9-x^-1)/(3*x^-1-x^-2) = 0
3*x^-1-x^-2 = 0
x^-1*(3-x^-1) = 0
-1*x^-1 = -3 // : -1
x^-1 = 3
-1 < 0
1/(x^1) = 3 // * x^1
1 = 3*x^1 // : 3
1/3 = x^1
x = 1/3
x^-1*(x-1/3) = 0
(9-x^-1)/(x^-1*(x-1/3)) = 0
-1*x^-1 = -9 // : -1
x^-1 = 9
-1 < 0
1/(x^1) = 9 // * x^1
1 = 9*x^1 // : 9
1/9 = x^1
x = 1/9
x = 1/9
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